After more than 43 years, the San Diego Union-Tribune is returning to its downtown roots. The Tribune Publishing-owned newspaper is relocating about 275 employees from a 13-acre site in Mission Valley into 60,000 square feet at 600 B St.

The media company signed a $40-million, 15-year lease with Lincoln Property to occupy space on floors nine though 12 in the 24-story, nearly 360,000-square-foot building. Gensler handled the design and BKM handled the interiors for the $6.8-million buildout, which includes open ceilings and flexible floor plans.

The move places the company in the center of a vibrant urban community, while putting reporters closer to many new stories and sources. CBRE’s Matt Carlson, Ryan Grant and Jeff Oesterbald handled leasing for the asset.